package com.eatsystem.controller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.eatsystem.common.Result;
import com.eatsystem.dto.DishDto;
import com.eatsystem.entity.Category;
import com.eatsystem.entity.Dish;
import com.eatsystem.entity.DishFlavor;
import com.eatsystem.service.CategoryService;
import com.eatsystem.service.DishFlavorService;
import com.eatsystem.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 新增菜品
     *
     * @param dishDto
     * @return
     */
    @PostMapping
    public Result<String> save(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());

        dishService.saveWithFlavor(dishDto);

        //清理某个分类下的菜品的缓存数据
        String key = "dish_" + dishDto.getCategoryName() + "_1";
        redisTemplate.delete(key);

        return Result.success("新增菜品成功");
    }

    /**
     * 菜品分页
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public Result<Page> page(int page, int pageSize, String name) {

        //构造分页构造器
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null, Dish::getName, name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);
        //执行分页查询
        dishService.page(pageInfo, queryWrapper);

        //进行对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");

        List<Dish> records = pageInfo.getRecords();

        List<DishDto> list = records.stream().map((item) -> {

            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item, dishDto);

            Long categoryId = item.getCategoryId(); //分类ID
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);

        return Result.success(dishDtoPage);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     *
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public Result<DishDto> get(@PathVariable Long id) {

        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return Result.success(dishDto);
    }

    /**
     * 修改菜品
     *
     * @param dishDto
     * @return
     */
    @PutMapping
    public Result<String> update(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());

        dishService.updateWithFlavor(dishDto);

        //清理某个分类下的菜品的缓存数据
        String key = "dish_" + dishDto.getCategoryName() + "_1";
        redisTemplate.delete(key);

        return Result.success("修改菜品成功");
    }

    /**
     * 更改停售启售状态
     *
     * @param status
     * @param ids
     * @return
     */
    @PostMapping("/status/{status}")
    public Result<String> updateSalesStatus(@PathVariable("status") Integer status, @RequestParam List<Long> ids) {
        log.info("启售/停售：{},id:{}", status, ids);

        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(ids != null, Dish::getId, ids);

        List<Dish> list = dishService.list(queryWrapper);
        if (list != null) {
            for (Dish dish : list) {
                dish.setStatus(status);
                dishService.updateById(dish);
            }
            return Result.success("菜品售卖状态已更改");
        }
        return Result.success("未知错误");

    }

    /**
     * 根据id删除菜品和对应的菜品分类
     *
     * @param ids
     * @return
     */
    @DeleteMapping
    public Result<String> delete(@RequestParam("ids") List<Long> ids) {
        log.info("删除：{}", ids);

        dishService.deleteWithFlavor(ids);

        return Result.success("删除成功");

    }

    /**
     * 根据条件查询对应的菜品数据
     *
     * @param dish
     * @return
     */
    @GetMapping("/list")
    public Result<List<DishDto>> list(Dish dish) {
        List<DishDto> dishDtoList = null;
        //构造key dish_ID_1
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();
        //先从redis中获取数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);

        if (dishDtoList != null) {
            //如果存在，直接返回，无需查询数据库
            return Result.success(dishDtoList);
        } else {
            //构造查询条件
            LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
            queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
            //添加条件，查询状态为1（起售状态）的菜品
            queryWrapper.eq(Dish::getStatus, 1);

            //添加排序条件
            queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

            List<Dish> list = dishService.list(queryWrapper);

            dishDtoList = list.stream().map((item) -> {
                DishDto dishDto = new DishDto();
                BeanUtils.copyProperties(item, dishDto);
                Long categoryId = item.getCategoryId();
                Category category = categoryService.getById(categoryId);

                if (category != null) {
                    String categoryName = category.getName();
                    dishDto.setCategoryName(categoryName);
                }

                //当前菜品id
                Long dishId = item.getId();
                LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
                lambdaQueryWrapper.eq(DishFlavor::getDishId, dishId);
                //SQL : select * from dish_flavor where dish_id = ?
                List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
                dishDto.setFlavors(dishFlavorList);
                return dishDto;
            }).collect(Collectors.toList());

            //如果不存在，需要查询数据库
            redisTemplate.opsForValue().set(key, dishDtoList, 60, TimeUnit.MINUTES);
            return Result.success(dishDtoList);
        }
    }
}
//    @GetMapping("/list")
//    public R<List<Dish>> list(Dish dish){
//
//        //构造查询条件
//        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
//        queryWrapper.eq(dish.getCategoryId() != null,Dish::getCategoryId,dish.getCategoryId());
//        //添加条件，查询状态为1（起售状态）的菜品
//        queryWrapper.eq(Dish::getStatus,1);
//
//        //添加排序条件
//        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
//
//        List<Dish> list = dishService.list(queryWrapper);
//
//        return R.success(list);
//    }



